Factorial Calculator

Compute exact factorials (n!) with arbitrary BigInt precision up to 170

Input Integer (n ≤ 170)

Calculation Result

6! Result

720

Trailing zeros: 1

Trailing Zeros

Scientific

Exact

Enter any integer n from 0 to 170.

Get the exact mathematical expansion, full integer string, and trailing zeros count.

Factorial Product Formula

n! = n × (n - 1) × (n - 2) × ... × 2 × 1; 0! = 1

Represents the total number of ways to arrange n distinct items in a sequence.

n = 6.

• 6! = 6 × 5 × 4 × 3 × 2 × 1 = 720

• Trailing zeros = 1

6! = 720.

By definition, there is exactly one way to arrange zero items (the empty set), which makes combinatoric formulas consistent.

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